Stardog is a knowledge graph platform based on a semantic graph database, implemented in Java and developed by Stardog Union. Considered by some to be an innovator in the space , Stardog aims to provide a platform for building knowledge graphs by unifying structured, semi-structured, and unstructured data through the use of semantic graphs.
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History
Stardog 1.0 was released in June 2012 in a free community edition as well as its commercial offering. The 2.1 release in January 2014 saw major breakthroughs in scalability.
The 3.0 release added an HA cluster and significant performance enhancements for both reads and writes.
Stardog 4 expanded its data unification support, transitioned to Java 8, and added support for property graphs.
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Implementation
The core is an ACID graph database utilizing Semantic Web standards. RDF is used for the data model, SPARQL as the query language, and OWL 2 for inference and rules. It also uses R2RML into facilitate the integration of external relational sources.
Languages
APIs are available for the Jena and Sesame as well as SNARL, the Stardog Native API for the RDF Language. Bindings for its HTTP protocol are also available in Javascript, .Net (programming language), Ruby (programming language), Clojure, and Python. Support for the Spring (framework) is also available.
Stardog also supports the property graph model via Gremlin.
Source of the article : Wikipedia
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